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Finding the Fourth Proportional to 303,446.20, 455,687.70 and 198,729.40

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Solution

The fourth proportional to 303,446.20, 455,687.70 and 198,729.40 is: 298,433.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,446.20 : 455,687.70 = 198,729.40 : x
  2. Step 2: Convert to fraction form
    303,446.20/455,687.70 = 198,729.40/x
  3. Step 3: Cross multiply
    303,446.20x = 455,687.70 × 198,729.40
  4. Step 4: Simplify right side
    303,446.20x = 90,558,543,208.38
  5. Step 5: Solve for x
    x = 90,558,543,208.38/303,446.20
  6. Step 6: Final answer
    x = 298,433.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.